Bird song is a form of advertisement, sending two messages to other birds of the same species. One message is a form of courtship. The singing male tells females he is available. The other message warns other males to stay out of his nesting territory.

Bird song is a form of advertisement, sending two messages to other birds of the same species. One message is a form of courtship. The singing male tells females he is available. The other message warns other males to stay out of his nesting territory.

Color is important to fish. It’s used for camouflage, mate selection and defense. While easily seen in tropical aquarium fish, our native fishes also have special colors.

Color is important to fish. It’s used for camouflage, mate selection and defense. While easily seen in tropical aquarium fish, our native fishes also have special colors.

Ticks are small, blood-sucking parasites related to spiders and mites. They’re often found in great numbers in areas where animals are abundant. Ticks will be active in these areas from April through September.

Ticks are small, blood-sucking parasites related to spiders and mites. They’re often found in great numbers in areas where animals are abundant. Ticks will be active in these areas from April through September.

In February and March, male red-wings travel north from their southern wintering grounds and find good spots for nesting and feeding.

The sway of spotted salamanders is a perfect ritual dance for Valentine's Day (which is this week, just in case you need a friendly reminder).

Recycling is critical in our “throwaway society” -- and the same is also true in nature.

In the early 1970s, America’s bald eagles were headed for extinction, and had become an endangered species. Although extinction is a natural process, the worldwide rate of extinctions has increased alarmingly due to human activities.